Locomotive-lamp case



I. WILLIAMS. Locomotive Lamp Case.

Patented Nov: 16, 1858.

N. PETERS. Phoio-Ulhagraphcr. wushin wn. D. c.

UNITED STATES PATENT OFFICE IRVIN A. WILLIAMS, OF UTICA, NEXV YORK.

LOCOMOTIVE-LAMP CASE.

Specification of Letters Patent No. 22,099, dated November 16, 1858.

To all whom it may concern:

Be it known that I, IEVIN A. WILLIAMS, of Ut-ica, in the county ofOneida and State of New York, have invented a new and useful Improvementin Locomotive- Lamp Cases; and I do hereby declare that the following isa full, clear, and exact description of the construction and operationof the same, reference being had to the annexed drawing, forming part ofthis specification, in which Figure 1 is an elevation of the lampchimney. Fig. 2 is a horizontal section on line :0 m. Fig. 3 is avertical section on line 3 y.

Similar characters of reference in the several figures denote the samepart.

The nature of my invention consists in inclosing the flues of locomotivelamp cases by the combination of casings and deflecting capssubstantially as hereinafter to be set forth for preventing downwarddraft.

In the drawings A is the smoke flue made conical at top and surmountedwith two concentric caps c c and a double curved deflecting plate a.Exterior to the flue A is the casing B, also conical at top and havingthe deflecting plate 6 above the open upper extremity. The casing B issurrounded by the exterior casing C, of form similar to casing B, asshown in Figs. 2 and 8, above which is the exterior deflector (Z. Thesedeflectors a 6 cl are all surfaces of double curvature placed above theline of truncation of the conical surfaces at the distance of the apexof each from said line. They are each of a greater diameter than theopenings bot-h above and below them, as shown in Fig. 3. The casings Band C have each four side openings 6 and covered by plates 29 and p, andthese opeir ings are so regulated that the openings of the inner casingcome between the openings of the outer, as shown in Fig. 2.

In operation whatever wind passes under deflector (Z will encounterdeflector b and will to a great extent be carried into the space 8between outer and inner casings and escape through outlets 2'. Shouldany wind pass under deflector b, it will be carried by deflector a andcap 0 to the space D between the flue A and easing B, and escape throughoutlets c to space s, and then pass through outlets i. The current alongcap 0 creates outward currents through the space 7' f so that any airpassing under deflector a will be drawn through these spaces instead ofdescending the flue.

By this construction the lamp will be entirely free from the influenceof descending currents to which all locomotive lamps are liable.

I claim The combination of casings B and C, with the chimney A asdescribed; the plates 79 and p alternating and the construction andarrangement of the several parts sub stantially as set forth.

In testimony whereof, Ihave hereunto signed my name before twosubscribing witnesses.

IRVIN A. WILLIAMS. lVitnesses D. GILLMORE,

GEORGE C. POTTER.

